As is mentioned in this new post to the project's releases, Mike van Riel and the contributors to the phpDocumentor2 project have released version 2.0 - the first stable release!

We have spent the past two months fixing bugs, adding tests and writing a brand new template. With this release it is now easier than ever to generate your documentation. And as a special party gift we bring you a brand new template, called Clean. Can't wait to see what it looks like? Then come over and see the demo.

He talks about some of the things yet to come for phpDocumentor including more features based on the PHPDoc standard, improving performance and making the existing systems (and templates) more robust and usable. You can find the full roadmap here. phpDocumentor is one of the most widely used PHP-based tools for generating automated documentation from docblocks already in your code.